I also had this update today and have to impression that I lost several applications on the market since then (possibly copy-protected?)
I bought Doodle Jump for instance, deinstalled it before the update (needed space), no I cannot find it anymore. Also FlightTrack seems to have "disappeared".
Anyone else encountering such behaviour?
S.
Edit: I checked, with the update to 2.1-update1, kernel 2.6.29-omap1, Build SHOLS_U2_02.36.0 you are not able to find copy protected apps in the market any longer. BEWARE OF UPDATING.